Black must play this before White can play c4-c5. The game is quickly heading toward total equality without any imbalances. But we'll still go through a little adventure to get there.
11. b1d2  11... d8c7  12. a1c1 Gukesh's opening preparation in this game is unimpressive. Black has already equalized. 12... f8d8 A new move. 13. b2b4 